Lens-post sleeve and method of forming the same.



F. A. STEVENS.

LENS POST SLEEVE AND MET HOD 0F FOR'MING THE- SAME. APPLICATION HLED FEB .14. 191s 1 267,%7, Patented May 28,1918.

- fizz/672207 iii/fibr ls sleeve after complete insertion,

' ED STATES PATENT @FFTQE.

FREDERICK A. STEVENS,

OF PROVIDENCE,

RHODE ISLA ND.

LENS-POST SLEEVE AND METHOD OF FORMING THE SAME.

Specification of Letters Patent.

Fatented May 28, 1918.

Application filed February 14, 1918. Serial No. 217,071.

eyeglass and spectacle mountings.

It has heretofore been unsuccessfully attempted to apply the cementitious material in such a manner that the resultant sleeve shall at all points thoroughly fill the spaces between the attaching posts and lenses.

The essential objects of my invention are to eifectively convey and introduce the filling or cementitious material into these spaces; and to produce a sleeve adapted to fill spaces of varying dimensions.

. To the above ends essentially my invention'consists in such parts and combinations of parts, and in such steps and successions of steps as fall within the scope of the appended claims.

Tri the accompanying drawings which form a part of this specification,

Figure 1 is a plan view of a lens and its adjacent parts, embodying my invention,

Figs. 2 and 3, a side elevation and transverse section respectively of a spiral metallic core,

Figs. 4 and 5, a like elevation and section respectively of the same coated, Fig.6, a longitudinal central section of an end portion of the lens and adjacent mounting parts, showing in vertical central section a cementitious bearing sleeve in its initial stage of insertion,

Fig 7, a similar section showing the Figs. 8 and 9,.a side elevation and transverse sectionrespectively of a braided fiber core," v Figs. 10 and 11, a similar elevation and J Fig. 13',. a section of a double stra lens mounting in connection with which my invention is capable of use.

Like reference characters indicate like parts throughout the views.

My invention in its preferred form of embodiment is shown in conjunction with a spectacle lens 15, bridge16, and a portion of the temple 17 pivoted to the end'piece 18 by the pin 19. The lens mountings carried by both the bridge 16 and end piece 18 are identical in form, and each comprises a lens clamp 20 and 21, carrying fast therein or integral therewith the attaching post 23 having an end thread 24 to engage the thread 25 of a clamping nut 26.

If desiredthe lens mountings may be of theform shown in Fig. 13, wherein a second strap 28 provided with a threaded perforation 29 is substituted for the nut 26; and a post 30, slidable in a perforation 31 in the strap 21, is substituted for the originally fixed post 23.

The lens near each end is provided with a hole 32 to receive the post 23, which hole is sufficiently ample to form a space 34 around the post.

In preparation for filling this space a compressible metallic core 36 of suitable length consisting of spiral loops 37, as shown in Fig. 2, has applied thereto a coating 38 of shellac or other cementitious material in such quantity as to fill the interstices 39 between the coils, and form a tubular length such as is shown in Figs. 4 and 5. This member is severed into tubes or tubular sec-. tions 40 of a length slightly greater than the thickness of the lens, and is manually in serted into the space 34 where it abuts against the strap 21 and loosely surrounds the post 23, with one of its ends projecting beyond the face of the lens, as shown in Fig. 6.

Heat is next applied by a flame or otherw1se to the parts adjacent the sleeve or tube 40 which softens the coating thereon, and while in this softened state the nut 26 is t1ghtened longitudinally crushing the tube and thereby combining with the core to radially distribute the coating material throughout the entirevarea of the space 34, as shown 1n Fig. 7.

An acceptable form of conveyer for the cement, may if, preferred, consist of a tubuv strap structure shown in Fig. 13, the second lar core 42 of fibrous material, preferably of braided fiber, whose textural interstices are not shown, since they are invisible, but common to textile fabrics. Such a core is shown in Figs. 8 and9. The coating 43 which covers the surface and interstices of this core is shown in Figs. .10 and 11. A finally inserted section or sleeve 45 cut from this length is shown in Fig. 12.

When a sleeve is inserted in the double strap 28' is manually pressed against the end of the sleeve, and the screw 30 is then engaged in the opening 29.

It will be noted that the cores 36 and 4:2 serve as conveyers of the cementitious material to the holes where the latter is to be applied; that after location in the holes the cores insure an even distribution of the material, and that the compressibility of the cores squeezes the materlal from their interstices and radially spreads the same.

I claim 1. The method of uniting a lens and post consisting in longitudinally compressing under a temperature sufficient to soften a coating acore located between the lens and the post and provided with a cementitious coating.

2. The method of uniting a lens and post consisting in surrounding the post within the lens with a compressible tubular core'carry- 'ing a coating of cementitious material, ap-

plying heat to soften thecoating, and 1ongitudmally compressing the' core to expel and spread the softened coating.

3. The method of uniting a lens and post consisting in placing loosely around the post within the lens a core saturated with cem- 5. .As a new article of manufacture a-lenspost sleeve comprising a spiral core, and cementitious coating incorporated in the core.

In testimony whereof I have aifixed my signature.

FREDERICK A. STEVENS. 

